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在简单应用题课堂教学中,当学生列出算式后,老师常提问学生,这道题为什么用这个方法计算?有的学生说成:“我是根据问题,现在还剩多少辆汽车?所以用减法。‘一天一共耕了多少亩?’所以用乘法。”有的学生甚至还说:“问题上‘一共’用加,问题上有‘倍’用除法。”也有的学生说:“我是看条件,哥哥比弟弟重10斤,所以用加法,二年级植树的棵数是一年级的3倍,所以用来法。”
In the simple application of classroom teaching, when the students list the formula, the teacher often asked the students, the question why this method of calculation? Some students said: “I am based on the problem, how many cars left now? So with Subtraction. 'How much mu a day a total?' So use the multiplication. ”Some students even said:“ The problem of 'total use of plus, the problem has' doubled' division. ”Some students said:" I am Look at the conditions, my brother weighs 10 pounds more than his brother, so with the addition, the number of second-year tree planting is three times the first grade, so used to law.